AdddmInitn
                Mandatory
                Hdr
                Mandatory
                Body
                Optional
                Envt
                Mandatory
                Cntxt
                Optional
                Tx
                Mandatory
                AdddmData
                Mandatory
                PrtctdData
                Repetition (0..n)
                CnttTp
                Mandatory
                EnvlpdData
                Optional
                Vrsn
                Optional
                Rcpt
                Repetition (1..n)
                KeyTrnsprt
                Choice
                Vrsn
                Optional
                RcptId
                Mandatory
                IssrAndSrlNb
                Choice
                Key Identifier
KeyIdr
                Choice
                Definition: Identifier of a cryptographic asymmetric key, previously exchanged between initiator and recipient.
Type: KEKIdentifier2
KeyId
                Mandatory
                KeyVrsn
                Mandatory
                SeqNb
                Optional
                DerivtnId
                Optional
                KeyNcrptnAlgo
                Mandatory
                NcrptdKey
                Mandatory
                KEK
                Choice
                KeyIdr
                Choice
                NcrptdCntt
                Optional
                NcrptdData
                Optional
                SplmtryData
                Repetition (0..n)
                SctyTrlr
                Optional